Screening criteria for ILs used in NH₃ based absorption heat pump systems

Screening criteria for ILs used in NH₃ based absorption heat pump systems

Wang, M. (TU Delft Engineering Thermodynamics)
Infante Ferreira, C.A. (TU Delft Engineering Thermodynamics)

Groll, Eckhard (editor)

2016

This paper describes a properties-optimization work for the working fluids in NH3 / ionic liquid (ILs) based single-effect absorption heat pumps. The optimum parameters of the IL can be used as criteria in screening task-specified ILs, which play the role of absorbents, in absorption heat pumps. First, a 8-parameter thermodynamic model to calculate performances of a single-effect absorption heat pump cycle was proposed, which is based on the non-random two-liquid (NRTL) activity coefficient model for the vapor pressure and a linear function for the heat capacity. Then, experimental data on the vapor-liquid equilibrium (VLE) of solutions and heat capacities of the pure ILs were reviewed and fitted to obtain ranges of those parameters. Within certain limits, the values of parameters were optimized in the following step using the above proposed mode. The objective is a maximum system performance. The optimized ILs have low molecular weights, low specific heats and have high absorption capabilities.

absorption cycle
heat pump
ILs
NH3

http://resolver.tudelft.nl/uuid:e50fc686-e88b-492b-ba81-4e10aef14ed9

Purdue University, West Lafayette, IN, USA

978-1-5108-2873-5

Proceedings of the 16th International Refrigeration and Air Conditioning Conference at Purdue: IRACC 2016

16th International Refrigeration and Air Conditioning Conference at Purdue, 2016-07-11 → 2016-07-14, West Lafayette, IN, United States

Purdue e-Pubs

Paper no. 1690 http://docs.lib.purdue.edu/iracc/1690

Institutional Repository

conference paper

© 2016 M. Wang, C.A. Infante Ferreira